Yarrow Formulas Methylcobalamin B-12 chewables come in 5000mcg dosage, and since there is little history of toxicity resulting from such a dosage that's what I began with and intend to stick with. Yarrow also is the manufacturer of B-Right complex, an excellent accompaniment.

Magnesium is also probably a good idea. I use Slow Mag tablets, twice daily, in concert with Morton Epsom Lotion applied liberally to the extremities which tends to stimulate capillary dilation allowing the oral greater effectiveness from increased blood flow. I prefer the lotion to the Epsom bath as a matter of practicality, as in my case it's physically easier to rub lotion than climb in and out of a bathtub.

You might also try Acetyl L-carnitine, starting with the one capsule 500mg dose, upping by 500mg per day, topping off at 2000mg for a month. All of the products mentioned are available through Amazon.com.

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